Heteroatom-doped woody plant-based electromagnetic wave absorption material and preparation method thereof

A technology of woody plants and absorbing materials, which is applied in the field of heterogeneous atom-doped woody plant-based electromagnetic wave absorbing materials and its preparation, can solve the problem of no absorption or shielding of electromagnetic waves, achieve multiple reflection effects, wide range of raw materials, Excellent electromagnetic wave absorption performance

Inactive Publication Date: 2021-03-09
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it has no absorption or shielding effect on electromagnetic waves

Method used

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  • Heteroatom-doped woody plant-based electromagnetic wave absorption material and preparation method thereof
  • Heteroatom-doped woody plant-based electromagnetic wave absorption material and preparation method thereof
  • Heteroatom-doped woody plant-based electromagnetic wave absorption material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step B101, take 10g of Chinese fir and dry it at 60°C for 5 days;

[0023] Step B102, put the dried Chinese fir obtained in the above steps into a vacuum tube furnace for high-temperature carbonization, the carbonization temperature is 700°C, the heating rate is 5°C / min, the carbonization time is 2 hours, the gas atmosphere is ammonia, and the flow rate is 100mL / min.

[0024] Step B103, cooling the above-mentioned carbonized sample to room temperature with the furnace to obtain a high-performance electromagnetic absorbing material with a three-dimensional through-hole structure.

[0025] in, figure 2 The scanning topography of the nitrogen atom doped fir-based carbon system in situ, image 3 Its microwave absorption performance diagram.

Embodiment 2

[0027] Step B101, take 10g of bamboo and dry at 60°C for 5 days;

[0028] Step B102, put the dried bamboo obtained in the above steps into a vacuum tube furnace for high-temperature carbonization, the carbonization temperature is 800°C, the heating rate is 5°C / min, the carbonization time is 2 hours, the gas atmosphere is hydrogen sulfide, and the flow rate is 50mL / min.

[0029] Step B103, cooling the above-mentioned carbonized sample to room temperature with the furnace to obtain a sulfur atom in-situ doped bamboo-based high-performance electromagnetic absorbing material with a three-dimensional through-hole structure.

[0030] in, Figure 4 Scanning topography of bamboo-based carbon system doped with sulfur atoms in situ, Figure 5 Its microwave absorption performance diagram.

Embodiment 3

[0032] Step B101, taking 10 g of camphor and drying at 100° C. for 5 days;

[0033] Step B102, put the dried camphor obtained in the above steps into a vacuum tube furnace for high-temperature carbonization, the carbonization temperature is 1000°C, the heating rate is 2°C / min, the carbonization time is 3 hours, the gas atmosphere is borane, and the flow rate is It is 50mL / min.

[0034] Step B103, cooling the above-mentioned carbonized sample to room temperature with the furnace to obtain a boron atom in-situ doped camphor-based high-performance electromagnetic absorbing material with a three-dimensional through-hole structure.

[0035] in, Figure 6 Scanning topography of camphor-based carbon system doped with boron atoms in situ.

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Abstract

The invention belongs to the field of electromagnetic wave absorption, and discloses a heteroatom-doped woody plant-based electromagnetic wave absorption material and a preparation method thereof. Heterogeneous elements are doped into a natural pore channel structure of a woody plant-based material in situ by utilizing technical means such as high-temperature cracking and the like, and meanwhile,the high-performance electromagnetic wave absorption material with a three-dimensional straight-through hole structure is constructed by utilizing the natural structure; the woody plants are any one of bamboos, hardwoods and softwood; the heteroatoms are one or more of B, N, O, S, P and the like. The heteroatom-doped woody plant-based electromagnetic wave absorption material has the advantages oflow price, good electromagnetic wave absorption performance, wide coverage frequency, wide raw material sources, environmental friendliness, simple manufacturing process, controllable process and thelike.

Description

technical field [0001] The invention belongs to the field of electromagnetic wave absorption, and relates to a heteroatom-doped woody plant-based electromagnetic wave absorption material with unique structure, excellent performance and environmental friendliness and a preparation method thereof. Background technique [0002] With the rapid development of the electronic information industry, different types of electronic equipment and communication electromagnetic waves of different frequencies have been widely used in human daily life. However, when these electronic and communication equipment work, such as computers, TVs, smart homes, mobile phones, communication base stations, broadcasting transmission systems, radar systems, satellite positioning systems, radio frequency induction and dielectric heating equipment, radio frequency and microwave medical equipment, etc., will Electromagnetic radiation of different forms, frequencies and intensities should not be produced and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00H01Q17/00C01B32/05
CPCH05K9/0081H01Q17/00C01B32/05
Inventor 张雪峰胡海华李逸兴郑芸
Owner NORTHEASTERN UNIV LIAONING
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